While looking at the values for GDP Share of World Total (PPP) data, please note: Gross domestic product based on purchasing-power-parity (PPP) share of world total. These data form the basis for the country weights used to generate the World Economic Outlook country group composites for the domestic economy. Please note: The IMF is not a primary source for purchasing power parity (PPP) data. WEO weights have been created from primary sources and are used solely for purposes of generating country group composites.